• Email Queues Approaching Normal: Microsoft has confirmed that email queues have been significantly reduced and are now approaching normal levels, with Outlook and Microsoft Teams operating normally for the majority of UK users.
• Root Cause Addressed: Microsoft stated that the disruption was triggered by a configuration issue following an earlier network capacity upgrade. Engineers have addressed the underlying issue and continue to restore capacity to the remaining affected infrastructure.
• Ongoing Monitoring: While most services have resumed, Microsoft continues to monitor server stability and process any residual queued messages. The extended 48-hour email retry timeout remains active to ensure delayed emails are delivered without bouncing.
• User Guidance: No action is required on your devices. If you still experience an isolated connection issue in Outlook or Teams, restarting the application or refreshing your browser session should restore normal access.

• Service Recovery Progress: Microsoft has reported encouraging recovery progress across Europe and the UK, with service availability and Outlook email delivery continuing to improve. 
• Email Backlog & Delays: Microsoft is actively prioritising queued messages to clear the email backlog. An extended 48-hour email retry timeout remains in place so delayed emails reach recipients without bouncing.
• Remaining Impact: While many UK users are now able to access Outlook and Teams normally, some intermittent connection timeouts or Teams calendar delays may still occur until full restoration is confirmed.
• User Guidance: No action is required on your devices. If Outlook does not immediately reconnect, simply closing and reopening the application or refreshing Outlook on the web may help re-establish a session. 

• Email & Outlook: Users may be unable to access their mailboxes via Outlook on the web, the desktop client, mobile apps, or REST APIs. Outbound and inbound email delivery may also be delayed. 
• Microsoft Teams: Calendar access, meeting scheduling, and creating new chats for organisations using Information Barriers may fail. Core instant messaging and active online meetings remain largely functional. 
• Other Microsoft 365 Services: Features within SharePoint Online, Microsoft 365 Copilot, and Defender Safe Links that rely on Exchange Online integration may experience timeouts or fail to load. 

• No action is required on your devices or network. Please avoid repeatedly signing out or reconfiguring email profiles, as this will not bypass the server-side outage. 
• Live Updates: Administrators and users can track real-time progress via the Microsoft Service Health Status page or the @MSFT365Status on X feed. 
• Comtec is actively monitoring the situation.

Service Overview & Latest Updates

ESMM (Enterprise Secure Monitoring & Management) is Comtec’s end-to-end critical infrastructure monitoring and support framework.
It combines real-time visibility, physical validation, alerting, reporting and engineering care into a single service designed to keep your power, cooling and environmental systems healthy and resilient.

ESMM supports environments of all sizes — from small server rooms to large multi-site estates — and is fully managed by Comtec’s specialist ESMM Monitoring & Support Team.

What ESMM Includes

1. ESMM – Monitoring Core

Real-time monitoring of UPS, PDUs, cooling and environmental sensors 
Features include:

• 24/7 monitoring

• Secure cloud dashboards

• Early warning alerts

• Asset visibility

2. ESMM VIEW –Physical Audits & Validation

Annual or requested onsite surveys to validate that what appears in monitoring matches what is physically in the room.
Benefits include:

• Identifies unmonitored or misconfigured equipment

• Updates asset lists

• Ensures no blind spots in monitoring

• Supports lifecycle and capacity planning

3. ESMM CONTROL –  Management of Onsite Assets

ESMM CONTROL ensures you’re covered with scalable, intelligent infrastructure support.:

• Configure Remote shutdown requirements such as Powerchute

• Configure onsite systems for monitoring such as DCE or ITAdvisor

• Backups onsite to be configured of critical appliances

• Local updates such as firmware

4. ESMM ALERT – Escalation & Notification

Guaranteed alerting workflows to ensure you never miss a critical event.
Options include:

• Email notifications

• SMS

• Phone escalation

• Automatic routing to the ESMM engineer team if unacknowledged

5. ESMM MAINTAIN – Engineering & Lifecycle Care

Hands-on technical support for preventive and corrective maintenance:

• UPS battery replacement

• Cooling remediation

• Hardware installation & commissioning

• Engineering callouts

• Performance and lifecycle planning

Licence Management

Comtec can provision exact quantities of EcoStruxure IT Expert licences with:

• No pack sizes

• No minimums

• Instant activation

• Free trials available

This ensures you always have the right number of licences without extra cost or delays.

How to Raise ESMM Requests

You can contact the ESMM Support Team via:

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